Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100S
The AirTAC SAIJ125X150-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 150 mm stroke that can be dialed back by up to 100 mm, yielding a highly versatile 50-150 mm usable travel window for precise end-position tuning during commissioning. Equipped with a SUS420J2 stainless steel rod and a magnetic piston, it integrates seamlessly with AirTAC CMSE reed and DMSE solid-state sensors via the dual-side extruded aluminum barrel grooves.
Delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa, this unit handles substantial loads. The rear adjuster acts purely as a mechanical stop to set the retract end; it does not hold the load without live air pressure. For true drop-and-hold safety, you must use an external pilot-operated check valve or explore the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100S Is Used
Machine Changeover
Dial in the exact retract position on the fly when switching a packaging line between different carton sizes, using the 50-150 mm travel window without adding external stops.
Variable End Stops
Fine-tune the end-of-stroke position during initial commissioning to dial out mechanical tolerance stack-ups in your fixture without disassembling the cylinder.
Assembly Pressing
Press bearings or pins into housings by precisely setting the stroke limit to prevent over-travel, relying on the 6136 N of push force available at 0.5 MPa.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100S the Right Cylinder?
Select this specific SAIJ configuration when your machine requires variable end stops across different product sizes, as the 50-150 mm adjustment range eliminates the need to physically swap cylinders during changeover. If your application requires less force, stepping down to a 100 mm bore yields 3927 N of push force at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N. This 125 mm bore operates at 30-500 mm/s and uses PT tapered G1/2 ports.
To replace an ISO 15552 cylinder, match the 125 mm bore, 150 mm stroke, 100 mm adjustment, PT port thread, and -S magnet. SAIJ uses a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the 150 mm stroke is relatively short, side-load stress is minimal, but an external guide is still recommended for heavy loads.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100S FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. If you need higher force, increasing pressure to 0.7 MPa yields 8590 N of push force.
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective stroke from 150 mm down to as little as 50 mm. It sets the travel end but does not lock or hold the load without continuous air pressure.
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